6.14.2 Drive belt – Tension check
Preconditions
☑
Engine is stopped and starting disabled.
Special tools, Material, Spare parts
Designation / Use
Part No.
Qty.
Tester
Y4345711
1
Fan drive – Checking belt ten-
sion
1.
Remove protective cover.
Note:
Frequency measurement method is preferred
over depression depth measurement method.
2.
Conduct measurement with tester.
3.
Read off measured value at the intersection
of display arm and "KG" scale. For specifica-
tions, refer to table below.
Application
Spec. value
Initial installation (new belt)
Spec. value
Operating tension (used belt)
Drive belt 1558 mm – fan
Frequency: 113 ±1 Hz
Frequency: 103 ±1 Hz
Drive belt 1558 mm – fan (with
supplementary mass)
Frequency: 113 ±1 Hz
Frequency: 103 ±1 Hz
Drive belt 1522 mm – fan
Frequency: 113 ±1 Hz
Frequency: 103 ±1 Hz
Drive belt 1707 mm – fan
Frequency: 113 ±1 Hz
Frequency: 103 ±1 Hz
Drive belt 1665 mm – fan
Frequency: 113 ±1 Hz
Frequency: 103 ±1 Hz
Drive belt 1623 mm – fan
Frequency: 113 ±1 Hz
Frequency: 103 ±1 Hz
Drive belt 1854 mm – fan
Frequency: 114 ±1 Hz
Frequency: 104 ±1 Hz
Drive belt 1800 mm – fan
Frequency: 118 ±1 Hz
Frequency: 104 ±1 Hz
Drive belt 2008 mm – fan
Frequency: 115 ±1 Hz
Frequency: 105 ±1 Hz
Drive belt 1971 mm – fan
Frequency: 116 ±1 Hz
Frequency: 106 ±1 Hz
Drive belt 1936 mm – fan
Frequency: 117 ±1 Hz
Frequency: 110 ±1 Hz
Table 2: Measuring belt tension with frequency meter
128 | Task Description | MS150094/02E 2015-05
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